Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > GENERAL DISCUSSIONS > General Discussions about our Montanas
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 05-21-2018, 04:32 PM   #1
Retire 2022
Montana Fan
 
Join Date: Jun 2017
Location: Burleson
Posts: 101
M.O.C. #20065
Summertime AC-Low, High, or Auto Fan

Anyone with Texas Summer Heat experience...
What setting should you set the Fan Speed to for most efficient mode...auto, high, or low? Also, what temperature should the thermostat be set at during the day while we're at work in order to maintain a coolness in the 5'er while it is is unoccupied with all window blinds closed? That way when we get home and turn it down a couple of degrees it will make it feel real comfortable and cool. Thank you in advance for your replies.
__________________
Doug and Suzanne: 2017 F350 CC 6.7L FX4 Dually
2017 Montana 3811ms Legacy Edition

Full Timing Since October 2017
Retire 2022 is offline   Reply With Quote
Old 05-21-2018, 06:53 PM   #2
Texan
Montana Master
 
Join Date: May 2017
Location: new caney
Posts: 510
M.O.C. #19873
Being close to Ft.Worth you are certainly living in a very hot part of the state. I set my thermostat to auto. I would buy me an thermometer and sit it on the kitchen counter or somewhere close to the middle of the rv. Set your thermostat at 72 or 74 and see how it compares to the thermometer on the counter. It's hard to say what to set you thermostat to until you get a good idea how accurate it is. I would think your thermostat is off 4 to 6 degrees if like most rv's. Just don't let your rv get so hot that your a/c is having a hard time playing catch-up. Texas heat is relentless . Sometimes it doesn't get below 80 degrees at night in Houston.
Texan is offline   Reply With Quote
Old 05-21-2018, 07:41 PM   #3
Mikendebbie
Montana Fan
 
Mikendebbie's Avatar
 
Join Date: Jan 2018
Location: Austin
Posts: 155
M.O.C. #21044
AC setting

When we bought a Jayco a few years back - the tech told me he never takes his AC off of high fan and set as cold as it will go. I have stuck with that philosophy ever since.

We were in east tx this past weekend for a family visit. Saturday afternoon I set both ACs to HI and put the number setting down to 65. I have both living room vents pointing toward the ceiling fan and we had the fan going. It was mid 90s outside and we were comfortable watching TV. While we were away from trailer I set it to AUTO and set the temp to 68 - did not want it to get hot while we were gone because I don't yet know how quickly it would recover when we got back. The ceiling fan does not exactly move much air but I figure it might distribute the cold air in the living room. I have never been a fan ( pardon the pun) of hugger ceiling fans. Wish there was something I could do to improve it.

We like to sleep cold! First night I set the bedroom AC to high and set it on 62. The living room AC was set to high and 65. I have both bedroom vents pointing to the headboard. We chose not to use the quilted bedspread and went with light covers. We FROZE! Second night I set both ACs to 64 with fan on high. We added the quilted bedspread. We were comfortable. From here on for summer nights I will set both to low 60's and leave both on high.

We had some warm nights back in March and I had the thing set to AUTO. We hated the thing cycling on and off all night long. I prefer it blowing steady ice cubes on HI all night long.
__________________
Mikendebbie Austin TX - Aggie '77
2014 Chevy 3500 Crew LTZ LB SRW
2018 Montana 3921FB
+ two cute Aussies Gus+Fern
Mikendebbie is offline   Reply With Quote
Old 05-21-2018, 08:10 PM   #4
1retired06
Montana Master
 
Join Date: Feb 2012
Location: Lake Gaston
Posts: 7,148
M.O.C. #12156
We have had great luck using auto mode
__________________
Mike and Lorraine
2002 3655 FL, 2005 3650RK
2010 3665RE, 2015 3910FB
F350 crew cab dually 6.7
1retired06 is offline   Reply With Quote
Old 05-21-2018, 08:48 PM   #5
CaptnJohn
Montana Master
 
Join Date: May 2017
Location: Eastern NC
Posts: 1,035
M.O.C. #19865
Auto mode works well for us,,, until the mid to hi 90s, then just leave it on high.
__________________
John & Patty
2017 Montana HC 370BR
2016 Lariat F350 4X4
CaptnJohn is offline   Reply With Quote
Old 05-21-2018, 09:10 PM   #6
DQDick
Montana Master
 
DQDick's Avatar
 
Join Date: Jun 2011
Location: Wilsey
Posts: 15,291
M.O.C. #11455
We have one that works fine on auto, but the livingroom one must be on high during the day or it will freeze up.
DQDick is offline   Reply With Quote
Old 05-21-2018, 09:20 PM   #7
AZ Traveler
Montana Master
 
AZ Traveler's Avatar
 
Join Date: Sep 2017
Location: Oro Valley
Posts: 1,182
M.O.C. #20477
I tend to use low here in AZ because it is quieter. With our very low humidity the a/c is much more efficient - secret is keeping blinds down to keep the hot sun out during the day.
__________________
Zack and Donna plus Millie
2018 Montana 3160RL
2012 F-250
"Life is too short to stay indoors, enjoy the ride!"
AZ Traveler is offline   Reply With Quote
Old 05-21-2018, 09:22 PM   #8
DQDick
Montana Master
 
DQDick's Avatar
 
Join Date: Jun 2011
Location: Wilsey
Posts: 15,291
M.O.C. #11455
We're in Kansas and the thread came from Texas so they'll freeze up in a minute on low in the humidity we have with our 100 degree heat.
DQDick is offline   Reply With Quote
Old 05-22-2018, 07:33 AM   #9
richfaa
Montana Master
 
Join Date: Jan 2005
Location: North Ridgeville
Posts: 19,155
M.O.C. #2839
We leave it on auto and that works for us. These Rv' are not that well insulated considering the high temps they may be subjected to. We have measured up to 124 degrees on the outside gel coat of this pretty dark colored Big Sky and 90 degrees on the inside walls in very hot temps. The A/C s work fine good flow and proper output temps.
richfaa is offline   Reply With Quote
Old 05-22-2018, 10:51 AM   #10
waynemoore
Montana Master
 
waynemoore's Avatar
 
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,307
M.O.C. #10552
I use auto all the time. I any fan mode when the compressor cycles off the fan will still be drawing in out side air.
waynemoore is online now   Reply With Quote
Old 05-22-2018, 03:29 PM   #11
Kyle and Lisa
Montana Fan
 
Join Date: May 2018
Location: livingston,tx
Posts: 338
M.O.C. #21685
We keep ours in auto, but start cooling early in the morning before it gets to hot. At night we run the bedroom fan continuously in low fan mode only.
Kyle and Lisa is offline   Reply With Quote
Old 05-23-2018, 09:49 AM   #12
kdeiss
Montana Master
 
Join Date: Feb 2003
Location: Englewood
Posts: 3,073
M.O.C. #164
[QUOTE=waynemoore;1099339]I use auto all the time. I any fan mode when the compressor cycles off the fan will still be drawing in out side air

The RV AC unit is not designed to bring in out side air Just recirculates. Fan draws in air through the return across the cold evaporator coil then back out the vents.
kdeiss is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 05:11 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.